chore(deps): bump slackapi/slack-github-action from 3.0.2 to 3.0.3 (#3297)

Bumps [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action) from 3.0.2 to 3.0.3.
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Changelog](https://github.com/slackapi/slack-github-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/slackapi/slack-github-action/compare/03ea5433c137af7c0495bc0cad1af10403fc800c...45a88b9581bfab2566dc881e2cd66d334e621e2c)

---
updated-dependencies:
- dependency-name: slackapi/slack-github-action
  dependency-version: 3.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Priya Patel <priya.patel@hashicorp.com>

.github/workflows/test-e2e-admin-ui.yaml

@@ -236,7 +236,7 @@ jobs:
           enos scenario destroy --timeout 60m0s --chdir ./support/src/${{matrix.folder_name}}/enos ${{matrix.enos_scenario}} builder:local
 
       - name: Send Slack message on failure
-        uses: slackapi/slack-github-action@03ea5433c137af7c0495bc0cad1af10403fc800c # v3.0.2
+        uses: slackapi/slack-github-action@45a88b9581bfab2566dc881e2cd66d334e621e2c # v3.0.3
         if: ${{ failure() && github.repository == 'hashicorp/boundary-ui' }}
         with:
           method: chat.postMessage